软组织结构可能会疝入上颌窦中，导致局部压迫和垂直性复视（箭头所指）。

Soft tissue structures may herniate into the maxillary sinus, leading to entrapment and vertical diplopia (arrow).

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复接器有三种结构：串行、并行和树型。

There are three structures of multiplexer: serial, parallel and tree.

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对后烟井前墙包复鳍片管结构突变处进行定性力学分析，针对性地提出相应措施及制造、安装时注意事项。

Qualitative mechanical analysis was made for special structure of back pass front wall, and relevant measures and notices for manufacturing and erection are presented.

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